Thanks, flight7. Going to the source was good advice. In this case, from the RCSC:
"Previous editions of this Specification treated shear planes in the thread transition length (see dimension Y in Figure C-2.2) as if the threads were excluded. Recent evaluation of this transition area and...
This is a snip of the table I'm talking about. Note that t is the minimum thickness of ply closest to the nut required to exclude threads from the shear plane. It makes determining bolt length and checking if threads are in the shear plane very simple. My questions are does anyone know why it...
This may be a question for the older more experienced crowd. There used to be a Bolt Length Selection table (Table 7-2) in previous versions of the Steel Manual (I believe it was the Silver and/or Navy Blue versions). It made bolt length selection and determining when to use thread condition X...